1-(50/200)^2-(0/200)^2-(150/200)^2
    1-(450/800)^2-(300/800)^2-(50/800)^2
    arctan0.5*2
    650/1000*0.6036+350/1000*0.6122
    1-(150/350)^2-(150/350)^2-(50/350)^2
    1-(350/650)^2-(150/650)^2-(150/650)^2
    500/1000*0.3200+500/1000*0.5600
    1-(100/500)^2-(300/500)^2-(100/500)^2
    1-(400/500)^2-(0/500)^2-(100/500)^2
    1 3( 1) 8
    19.5/6×[（5.9+2.187）^3×0.27-3.69×2.187^3]=
    0.3252/0.7219
    0.0312/0.9341
    19.5/6×[（5.9+2.187）^3-3.69×2.187^3]=
    -(800/1000)*log(2,800/1000)-(200/1000)*log(2,200/1000)
    -(650/1000)*log(2,650/1000)-(350/1000)*log(2,350/1000)
    -(500/1000)*log(2,500/1000)-(500/1000)*log(2,500/1000)
    47^(1/4)
    47^1/4
     42+16= 61+17= 61+28=

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